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TDA3609JR Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. TDA3609JR
Description  Multiple voltage regulator with switch and ignition buffers
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 6 page
background image
1997 Aug 15
6
Philips Semiconductors
Preliminary specification
Multiple voltage regulator with switch and
ignition buffers
TDA3609JR
The power switch can also be controlled by means of a
separate enable input (pin 11).
All output pins are fully protected. The regulators are
protected against load dump (regulator 1 and 3 will switch
off at supply voltages >18 V) and short-circuit (foldback
current protection).
The switch contains a current protection, but this
protection is delayed at short-circuit condition for at least
10 ms. During this time the output current is limited to a
peak value of at least 3 A and 2 A continuous (VP ≤ 18 V).
At supply voltages >17 V the switch is clamped at
maximum 16 V (to avoid external connected circuitry being
damaged by an overvoltage) and the switch will switch off
at load dump.
By means of two independent ignition Schmitt triggers and
ignition output buffers (one open collector and one
push-pull output), interfacing with the microcontroller can
be accomplished (simple full/semi on/off logic
applications). The ignition 1 output is inverted.
The total timing diagrams are shown in Figs 3 and 4.
Fig.3 Timing diagram ignition Schmitt triggers.
handbook, full pagewidth
load dump
load dump
VP
ignition 1
input
ignition 1
output
VP
ignition 2
input
ignition 2
output
7.0 V
4.5 V
≥3.25 V
≥−100 V
5.0 V
≤50 V
≤1.1 V
≥2.2 V
≥−100 V
5.0 V
≤50 V
≤2.0 V
Enable Schmitt trigger ignition 1
Enable Schmitt trigger ignition 2
MGK611




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